Chinese Natural Agate Original Stone Necklace Dimension: 29*18*13 (mm) 1.14*0.71*0.51 (in) Weight 0.08 lbs/38g Agate is a code, Ma Nao, horse brain, is a kind of mineral chalcedony class, is often mixed with grain belt of the block Opal and cryptocrystalline quartz, Mohs hardness of 7, the density of 2.6-2.7 grams per cubic centimeter, a level of color, translucent to opaque. Often do decorations or hobby. See clusters of agate often in ancient burial.

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